Blade grinder



F. E. BROBERG 2,409,416

BLADE GRINDER Filed May 9, 1945 lNVENTOB FRED EBROBERG Ar TORNEYS Patented Oct. 15, 1946 UNITED STATES PATENT'OFFICE BLADE GRINDER Fred E. Broberg, Racine, Wis.

Application May 9, 1945, Serial No. 592,878

1 Claim. 1

My invention refers especially to scissors blade Sharpeners and it has for its object to provide a simple, durable blade sharpener and grinder for use by those unskilled in the cutlery sharpener art. The tool is especially adapted for use in barber shops or other places wherein scissors or shears for hand cutting are in use and constantly requiring attention.

A specific object of my invention is to provide a grinding tool having a motor driven abrasive ring and a blade guide or rest associated therewith, and having adjusting means to position the blade guide incidental to wear upon the grinding ring.

Another object of my invention is to provide a wheel disc having a group of circumferential apertures therein, for the reception of iibre buttons which are formed with the ring and secured by upsetting, the said feature being desirable due to the fact that the ring is strengthened against cross cracking undergrinding pressure.

With the above and other minor objects in view, the invention consists in certain peculiarities of construction and combination of parts, as will be hereinafter fully set forth with reference to the accompanying drawing and subsequently claimed.

In the drawing:

Figure 1 represents a sectional elevation of a grinding tool embodying the features of my lnvention, -the section being indicated by line I-I of Figure 2.4

Figure 2, a face View of the same with parts broken away and in section to more clearly illustrate structural features.

Figure 3, a plan sectional view of the tool, the section being indicated by line 3-3 of Figure 1, and

Figure 4, a fragmentary face View of the housing, having attached thereto an adjustable blade guide. 1

Referring by characters to the drawing, I indicates a housing having e, removable face-plate I' and a horizontally disposed shaft receiving sleeve 2. The sleeve has journaled therein a shaft 3 to which is secured a pulley wheel 4 at its front end. The outer face of the pulley in turn has fitted and secured thereto a disc 5. The disc is formed with a series of circumferential perforations, through which is pressed headed buttons 6 of an abrasive ring I to permanently secure the ring and, as indicated, the front face of said ring is slightly angled or ilared rearwardly, it being noted that the ared grinding face of said ring just clears the inner face of the face-plate I The face-plate is formed with a horizontally disposed blade receiving slot 8, adjacent to the center of the abrasive ring, and said slot extends to the edge of the face-plate, at which point it is intersected by a rectangular clearance notch 8 in the housing wall, as best indicated in Figure 4 of the drawing.

The lower edge of the slot 8 has fitted thereto a slightly inclined guide or blade rest 9, which rest is pivotally supported by a bracket I0 secured to the front wall of the face-plate I', adjacent the center of the abrasive ring.

The outer end of the blade rest 9 is provided with a downwardly turned lip II, having a blade guide tooth II extending upwardly therefrom. The inner end of the lip II is slotted for'the reception of a retaining screw I 2, which engages the housing wall rearwardly of the notch therein, whereby the inner edge of the rest or guide, which parallels the face of the abrasive ring, is adjust- .able with reference to the ring face angle.

The abrasive pulley wheel assemblage is driven by a belt I3 from a pulley I3', which pulley is mounted upon the shaft of an electric motor 4.

It will be noted that the motor is pivotally s mounted upon the inner side walls of the housing Iby screw bolts I5. 2'

Interposed between the lower face of the housing sleeve 2 and motor shell, is` a guided coil spring I6, which serves to hold the belt I3 under tension at al1 times. j

While I have shown and described a simple exemplification of my invention minutely as to detail, it is to be understood that I may vary the structural features within the scope of the claim.

I claim:

A blade Sharpener tool comprising a housing, a motor driven abrasive wheel mounted therein, the same including an abrasive ring, a face-plate carried by the housing, having a horizontally disposed slot therein extending outwardly from a point near the center of the wheel, an angularly positioned blade rest adjacent the lower edge of the slot, a bracket carried by the face-plate near the center of the wheel, a pivot connecting the bracket and blade rest, a down turned lip extending from the blade rest, a guide tooth carried by the lip adapted to guide a blade being sharpened, and means connecting the down turned lip, and housing for adjusting the aforesaid blade rest relative to the abrasive ring.

FRED E. BROBERG. 

